Output is data that has been processed into a useful form. Most often output we see are through output device such as monitor, speaker and printer.
Types of output device:
A) Display device- visually conveys text, graphics and video information.
For example:
1) Monitor- a display screen used to provide visual output of a computer such as LCD (Liquid Crystal Display) Monitor and Widescreen. LCD uses a liquid compound to present information on a display device and it contain active-matrix display (depends on thin film transistor) and passive-matrix display (use a simple grid to supply charge). Quality of LCD monitor depends on resolution (number of pixels in rows and column), response time, brightness, dot pitch (distance between pixels) and contrast ratio (ratio of luminance of brightest colour to darkest colour). Graphic processing unit (GPU) controls the manipulation and display of graphics on a display device.
2) Plasma monitor- display devices that use gas plasma technology.
3) Television- such as digital television (DTV) and HDTV.
4) CRT monitor- uses cathode-ray tube to display.
B)Printer- device that accept text and graphics output from a computer and transfers the information to paper.
Types of printer:
1) Non-impact printer- forms characters and graphics on a piece of paper without striking and leaving mark on paper.
For example:
i) Ink-jet printer- forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
ii) Photo printer- produces colour photo-lab-quality pictures.
iii) Laser printer- high speed printer that uses laser technology. A rotating mirror will deflect a laser beam across surface of a drum that creates charges which will attract toner to stick to the drum. The toner will transfer to the paper when drum rotate and press against paper. And a set of roller uses heat and pressure to fuse the toner permanently to the paper.
iv) Multifunctional peripheral- a single device that scan, print, copies and fax.
v) Thermal printer- generate images by pushing electrically heated pins against the heat sensitive paper. For example, thermal wax-transfer printer and dye-sublimation printer.
vi) Mobile printer- small, lightweight and battery-powered printer for portability.
vii) Label printer- small printer that prints on adhesive-type material.
viii) Plotter- used to produce high quality drawings.
ix) Large-format printer- create photo-realistic quality colour prints on a larger scale.
2) Impact printer- form characters and graphics on a piece of paper by striking and leaving mark on paper.
For example:
i) Dot-matrix printer- produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon.
ii) Line printer- prints an entire line at a time.
C) Speakers, Headphones and Earbuds- an audio output device that produces sound.
For example:
1) Speaker- convert analog audio signals into equivalent air vibration in order to make audible sound.
2) Headphones- speaker that cover the ear.
3) Earbuds- rest inside ear canal.
D) Data projector- is a device that takes text and images displaying on computer screen and projects them on a larger screen.
For example:
1) LCD projector.
2) Digital light processing (DLP) projector.
E) Interactive white board- a touch sensitive device, resembling a dry-erase board that displays the image on a connected computer screen.
F) Force feedback game controller- send resistance to the device in response to actions of the user.
G) Tactile output- provide a user with physical response from the device.
2) Plasma monitor- display devices that use gas plasma technology.
3) Television- such as digital television (DTV) and HDTV.
4) CRT monitor- uses cathode-ray tube to display.
B)Printer- device that accept text and graphics output from a computer and transfers the information to paper.
Types of printer:
1) Non-impact printer- forms characters and graphics on a piece of paper without striking and leaving mark on paper.
For example:
i) Ink-jet printer- forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
ii) Photo printer- produces colour photo-lab-quality pictures.
iii) Laser printer- high speed printer that uses laser technology. A rotating mirror will deflect a laser beam across surface of a drum that creates charges which will attract toner to stick to the drum. The toner will transfer to the paper when drum rotate and press against paper. And a set of roller uses heat and pressure to fuse the toner permanently to the paper.
iv) Multifunctional peripheral- a single device that scan, print, copies and fax.
v) Thermal printer- generate images by pushing electrically heated pins against the heat sensitive paper. For example, thermal wax-transfer printer and dye-sublimation printer.
vi) Mobile printer- small, lightweight and battery-powered printer for portability.
vii) Label printer- small printer that prints on adhesive-type material.
viii) Plotter- used to produce high quality drawings.
ix) Large-format printer- create photo-realistic quality colour prints on a larger scale.
2) Impact printer- form characters and graphics on a piece of paper by striking and leaving mark on paper.
For example:
i) Dot-matrix printer- produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon.
ii) Line printer- prints an entire line at a time.
C) Speakers, Headphones and Earbuds- an audio output device that produces sound.
For example:
1) Speaker- convert analog audio signals into equivalent air vibration in order to make audible sound.
2) Headphones- speaker that cover the ear.
3) Earbuds- rest inside ear canal.
D) Data projector- is a device that takes text and images displaying on computer screen and projects them on a larger screen.
For example:
1) LCD projector.
2) Digital light processing (DLP) projector.
E) Interactive white board- a touch sensitive device, resembling a dry-erase board that displays the image on a connected computer screen.
F) Force feedback game controller- send resistance to the device in response to actions of the user.
G) Tactile output- provide a user with physical response from the device.
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